In Flutter i want to replace .doc firebase with username or namecontroller-CodePudding

First of all i will be highly thankful to stackoverflow community you guys are great. Problem: i am using namecontroller for firebase username and password is

TextEditingController nameController = TextEditingController();

TextEditingController passwordController = TextEditingController();

and here is authentication with firebase

 final user = await _auth.signInWithEmailAndPassword(
                          email: nameController.text,
                          password: passwordController.text);

and here is code through i will save gps data to firebase firestone database

final loc.LocationData _locationResult = await location.getLocation();
  await FirebaseFirestore.instance.collection('location').doc('user1').set({
    'latitude': _locationResult.latitude,
    'longitude': _locationResult.longitude,
    'name': 'Bus No.1'
  }, SetOptions(merge: true));

as .doc is created with name user1 and 'name' : 'Bus No.1' i want to replace .doc firebase with username or namecontroller previously i used and also name field with same username is it possible because lot of other user using this app so database save data separetely. Thanks

CodePudding user response：

Why not pass the value to your function?

Future<void> setUserData(String docId, String name) async {

final loc.LocationData _locationResult = await location.getLocation();
await FirebaseFirestore.instance.collection('location').doc(docId).set({
    'latitude': _locationResult.latitude,
    'longitude': _locationResult.longitude,
    'name': name
  }, SetOptions(merge: true));
}

Then call the function and pass the value in the controller, like this:

setUserData(user.id, nameController.text);

CodePudding user response：

So, It'll be better to save the document by userId which is unique for each user, hence avoiding reputation. It can be accessed using -

User? user = FirebaseAuth.instance.currentUser;
String uid = user!.uid;

So let's create the document for this user in Firestore!

/// from above example
User? user = FirebaseAuth.instance.currentUser;
String uid = user!.uid;

///name of user using nameController
String name = nameController.text;

final loc.LocationData _locationResult = await location.getLocation();
  await FirebaseFirestore.instance.collection('location').doc(uid).set({
    'latitude': _locationResult.latitude,
    'longitude': _locationResult.longitude,
    'name': name        <-- from TextEditingController()
  }, SetOptions(merge: true));

Congrats, you just made a firestore document with document-id same as that of user-id, which is unique and set a name property which could be used within your app.

now if you want to access name of current user,

String uid = FirebaseAuth.instance.currentUser!.uid;  <-- null check is required
DocumentSnapshot document = FirebaseFirestore.instance.collection('location').doc(uid).get();
Map<String, dynamic> data = document.doc() as Map<String, dynamic>;

///lets say you want to get name
var name = data['name'];

read further by following this guide -> https://firebase.google.com/docs/firestore/query-data/get-data